Outboard motor



Nov. 3 1925. 1,559,616

L. J. JOHNSON ET AL OUTBOARD MOTOR Filed June 16. 1924 INVENTORS. oOazs .7 Jfzsozz.

I I L/l f A TTORNE Y.

Patented Nov, 3, 1925.

UNITED STAT-Es .PATENT OFFICE. I

LOUIS J'. JOHNSON, OF MISHAWAKA, AND HARRY L. JOHNSON, OF INDIANAPOLIS, INDIANA, ASSIGNORS T0 JOHNSON BROS. ENGINEERING CORPORATION, 0F SOUTH BEND, INDIANA.

OUTBOABD MOTOR.

Application mea :une 1e, 1924. serial No. 720,318. I

vTo all whom it ma@ concern:

Be it known that we, Louis J. JOHNSON, a citizen of the United States, residing at Mishawaka, in thecounty of St. Josephand 5 State of Indiana, and HARRY L. JOHNSON, a citizen of the United States,` residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain lnew and `useful Improvements in Outboard Motors, of which the. following is a specifi- The invention relates to outboard motOrs particularly of the type used in connection with small craft wherein the motor is pivotally mounted and movable, and has for its object to provide in connection withl a motor of this character, means whereby when the motor comes into enga ement with an obstruction, for instance a og, rock or sand bar,

the initial shook 4of the impact will beyieldably taken up and absorbed, thereby reducing the strain onv the motor. A A furtherobject is to provide a pivoted outboard motor with a pivoted obstruction engaging arm extending downwardly forwardly of the free end of the casing and having its end yieldably connected to the lcasing and forming means for taking up the' initial shock when coming into engagement with an obstruction, and relieving the strain on the motor, incident to the startin of the tilting operation thereof. The de ice is particularly adapted foruse ,in connection with motors of the type set` forth in our aplication for patent filed the 16th day of' une, 1924, Serial No. 7 20,317

A further object 1s to provlde ,means whereby the pivoted arm will form a yieldable stop lwhen the motor moves from a tilted to a' vertical operative position, thereby reducing the strain on the motorincident to shock of a suddenvstopping thereof in itspivotal movement. v. -v

Vlfith the above and ther objects'i'n view the invention resides in the combination and arrangement i of parts as hereinafter set forth, shown in the drawing, described and claimed, it being understood' that changes in vthe precise embodiment of the invention may be made within the scope of what 1s claimed without departing invention.

Afrom the 'spirit of the the pivoted shock absorbing arm starting' its shock absorbing operation.

Figure 3 is a detail perspective view of the lower portion of ,a recess in the stern of the boat, showing slotted members carried thereby for the reception of the shock ab# sorbing arm. f

' Figure 4 is an enlarged detail sectional View through the lower end of the propeller drive shaft casing, showing the yieldable spring means.

Referring to the drawing, the numeral l designates the hull of a boat and l2 a recess in the stern thereof, at 37 within the upper end of the 'recess 2 is a moto-r 4 of a general outboard type, as set forth in the applicationabove referred to, and wherein the mufller 5, andthetransverse plate 6 forms a closurefor the rear end of therecess 2, and a horizontal disposed bifurcated plate 7, in combination with a yieldable member 8 carried by the muffler at opposite sides of the drive shaft casing 9 forms a bottom closure for the recess. It has been found in outboardl motors, and 'par- -ticularly motors of the-character set forth, when the lower end of the motor engages a log or obstruction in the water, the initial shock and jar on the motor, incident to the impact, damages the motor and strains .various parts thereof. To obviate this difliculty a yieldable gua-rd arm '10 is. provided, which arm is pivotally connected at 11 to :the pivotally mounted motor angl cxtends'down- Pivotally mounted Figure 2 1s a v1ew s1m1lar to Figure l,

wardly forwardly of the motor casing 9.

The guard arm l() extends through the slot 7 in the bifurcated. plate', andthe slot 12 inthe lower flange 13 of theJ channeled i member 14, and alsothrough a slot 15 'in the .closure plate 16 carried by the casing 9, rand which closure plate, when the motor is in operative position as shown in Figure l lis in substantially the same plane as the bottom 17 of the boat. Arm 10 entends link connection 20 with the arm 10, will be forced rearwardly, thereby compressing the coiled spring 21, surrounding the reduced guide portion 22 of the piston rod, consequently the initial shock ofthe impact 1s taken up and absorbed, at the starting of the tilting operation to the dotted line position shown in Figure l, consequently the propeller 23 will not come into contact with the obstructions. The -reducedportion 22 of the piston rod is connected to the piston 24 which engages one end of the coiled spring 21 and it is slidably-mounted in a movable plug 25, therefore it will be positively guided in`its axial movement and will not bind. The link connection 20 allows freedom of movement during the shock absorbing operations.

After a tilting .operation of the motor by engagement of 'the arm 10 with an obstruction, the motor will automatically move to vertical operative position after passingv the\ obstruction, and which movement is 'a relatively quick one under the influence of the propeller 23, which rotates at all times, therefore it will be seen that considerable shock would take place on the motor if means were not providedl for taking up the shock. Under 'the above conditions the arm 10, as the lower end of the asses into the slot 12 of the fiange 13 as c early shown in Figures 2 and 3 and the arm is stopped by engagement with the inner end of the slot 12, therefore the continued forward movement of the free end of the motor will compress the spring 21, thereby taking up the shock, and obvia-ting sudden stopping of the free end of the motor, As the free end ofthe motor continues inits movement to operative position, the forward end of the plate 16 comes into engagement vwith a strip of yieldable material, forinstance rubber, disposed in the Vvchannel 14, said yleldable material 'being designated by the numeral 26, consequently the shock of stopplng 1s additionally checked and at the same time a relatively tight joint is .provided when .the platef16 forms' a relatively tight closure for the lower end of thereduced ortion 2a of the recess 2 in the stern of the oat. From the above it -will be seen that a yieldable obstruction engaging device is provlded for outboard motors of the pivotally mounted type,

'yieldable in-relation to the motor.

and which obstructionv engme device wlll absorb the shock incident to the moto-r coming in contact withl ob-` structions and will also absorbl the shock incident to the motor returning to normal operative position, and ne which is particularly 'adapted for use Iin connection with a pivoted motor mounted in a recess 1n the sternof a boat and extending through and carrying closure plates for the recess.

y The invention havmg been set forth what 1s claimed as new and useful 1s:,-

1. The combination with la pivotally kmounted motor, said motor being'carried by a bcat,'of a guard for the free end of said motor, said guard being yieldably mounted on the motor and yieldable in relation thereto and `forming means whereby initial shocks gaging member carried by the free end ofv the motor and yieldable in relation to the motor. l c

3. The combination with a pivotally mounted outboard motor, carried by the free end of said motor, of a yieldable shock absorbing obstacle engaging member carried by the free end of the motor forwardly of the propellery and 4. The combination with. a pivotally mounted outboard motor, a propeller carried by vthe free end of said motor, an arm pivotally connected to the motor and extending towards its free end forwardly of the propeller, and a yieldable connection between the arm and the `free end of the motor.

5. The combination with a pivotally mounted outboard motor, a propeller carried by the free end of said motor, an arm pivotall)r connected to the motor at its forward side and terminating forwardly of the free end ofthe motor and forwardly of the propeller, and a yieldable connection between the arm and the motor.

a propeller 6. The combination wit-h the free endof i a pivotally mounted outboard motor, a prodownwardly forwardly of the propeller, a-

leo

coiled spring disposed in a chamber of the free end of the motor, and means carried by said armv and cooperating with the sprlng whereby initiall shocks` of im acts will be taken up by the spring and relleved from the motor. v A

if?. The 'combination with a pivtauy mounted outboard motor carried by a boat, of 'a yleldably mounted propeller- Iguard,``

said guard forming means whereby shocks of impacts will 'be taken up as the motor is* moved from operative to inoperative position, and from inoperative to operative position. p

8. The combination with? a pivotally mounted motor, said motor being pivotally connected to a boat. of a shock absorbing arm pivoted to the motor and disposed be* tween the motor and the boat, said shock absorbing arm forming a,h guard for the free end of thevmotor, and a yieldable buer between the motor and the boat.

9.The combination with a pivot-ally mounted motor, said motor being pivotally mounted in a recess in a boat, plates disposed within the recess and carried by the motorand forming closures for said recess, ofa pivoted guard arm carried by the motor `connected guard arm interposed between the motor and the boat and forming shock absorbing means upon initial upward move.v

ment of the motor and upon final downward movement of the motor. n

lIn testimony whereof we aifix our; signatures.y l 4 LOUIS J. JOHNSON. HARRY L. JOHNSON. 

